Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of performing a hybrid automatic repeat request (HARQ) operation by a user equipment (UE) in a non-orthogonal multiple access (NoMA) based system, the method comprising: receiving a downlink control information (DCI) format including a multiple access (MA) signature field for supporting NoMA transmission; receiving downlink data based on a value of an MA signature indicated by the MA signature field; and transmitting an acknowledgement/negative acknowledgement (ACK/NACK) signal for the downlink data based on a subframe offset value, a frequency offset value, or a sequence index value tied to the value of the indicated MA signature according to a predetermined rule, wherein the subframe offset value comprises a subframe offset value between a subframe in which the downlink data is received and a subframe in which the downlink HARQ feedback for the downlink data is transmitted, and wherein the frequency offset value indicates a frequency band for transmitting the ACK/NACK signal.
This technical summary describes a method for performing hybrid automatic repeat request (HARQ) operations in a non-orthogonal multiple access (NoMA) based wireless communication system. The method addresses the challenge of efficiently managing HARQ feedback in NoMA systems, where multiple users share the same time-frequency resources using different multiple access (MA) signatures. The method involves a user equipment (UE) receiving downlink control information (DCI) that includes an MA signature field, which specifies the MA signature used for downlink data transmission. The UE then receives downlink data based on the indicated MA signature. To provide HARQ feedback, the UE transmits an acknowledgement/negative acknowledgement (ACK/NACK) signal for the downlink data. The transmission of the ACK/NACK signal is determined by a subframe offset value, a frequency offset value, or a sequence index value, which are tied to the MA signature value according to a predetermined rule. The subframe offset value defines the timing difference between the subframe carrying the downlink data and the subframe carrying the HARQ feedback. The frequency offset value specifies the frequency band used for transmitting the ACK/NACK signal. This approach ensures efficient and reliable HARQ feedback in NoMA systems by leveraging the MA signature to determine the feedback transmission parameters.
2. The method of claim 1 , wherein the MA signature comprises a codeword index, a codebook index, an interleaver index, a demodulation reference signal index, a spatial dimension, or a power dimension.
This invention relates to wireless communication systems, specifically methods for generating and utilizing modulation and coding (MA) signatures in multi-user communication environments. The problem addressed is the need for efficient and flexible signaling to support multiple users in shared communication channels, particularly in scenarios where different users may require distinct modulation and coding schemes. The method involves generating an MA signature that includes one or more of the following parameters: a codeword index, a codebook index, an interleaver index, a demodulation reference signal index, a spatial dimension, or a power dimension. These parameters define the specific modulation and coding configuration for a given user or communication link. The codeword index identifies a specific codeword from a predefined set, while the codebook index selects a particular codebook used for encoding. The interleaver index determines the interleaving pattern applied to the encoded data, and the demodulation reference signal index specifies the reference signal used for demodulation. The spatial dimension parameter defines the spatial characteristics of the transmission, such as beamforming or antenna selection, and the power dimension parameter controls the transmission power level. By incorporating these parameters into the MA signature, the system can dynamically adapt to varying channel conditions and user requirements, improving overall communication efficiency and reliability. The method ensures that each user receives an optimized modulation and coding scheme tailored to their specific needs, enhancing performance in multi-user wireless networks.
3. The method of claim 1 , wherein the ACK/NACK signal is transmitted further based on a number of a control channel element (CCE) on which the MA signature field is transmitted according to the predetermined rule.
This invention relates to wireless communication systems, specifically methods for transmitting acknowledgment/negative acknowledgment (ACK/NACK) signals in multi-user scenarios. The problem addressed is efficiently conveying ACK/NACK feedback in systems where multiple users share the same communication resources, such as in multi-user multiple-input multiple-output (MU-MIMO) or carrier aggregation (CA) environments. The solution involves transmitting ACK/NACK signals based on a multi-antenna (MA) signature field, which is determined according to a predetermined rule. The MA signature field is used to distinguish between different users or data streams. The transmission of the ACK/NACK signal is further refined by considering the number of control channel elements (CCEs) used to transmit the MA signature field. This ensures proper resource allocation and reduces interference, improving the reliability of ACK/NACK feedback in shared communication channels. The method dynamically adjusts the transmission parameters based on the CCE count, optimizing spectral efficiency and system performance. The invention is particularly useful in advanced wireless networks where efficient feedback mechanisms are critical for maintaining high data rates and low latency.
4. The method of claim 1 , wherein the ACK/NACK signal is transmitted in the subframe indicated by the subframe offset value tied to the value of the indicated MA signature.
A method for wireless communication involves transmitting an acknowledgment (ACK) or negative acknowledgment (NACK) signal in a subframe determined by a subframe offset value. The subframe offset value is linked to a specific modulation and coding scheme (MA) signature used in the communication. This approach allows for efficient scheduling and resource allocation in wireless networks by dynamically assigning subframes for ACK/NACK feedback based on the MA signature. The method ensures timely and reliable feedback transmission, improving overall system performance. The subframe offset value is derived from the MA signature, which may include parameters such as modulation type, coding rate, or other signal characteristics. By tying the subframe offset to the MA signature, the system can optimize resource usage and reduce latency in feedback transmission. This technique is particularly useful in scenarios where multiple devices share the same communication channel, as it helps manage interference and ensures proper synchronization. The method enhances the reliability and efficiency of wireless communication by providing a structured and predictable framework for ACK/NACK signaling.
5. The method of claim 1 , wherein the ACK/NACK signal is transmitted in the frequency band indicated by the frequency offset value tied to the value of the indicated MA signature.
This invention relates to wireless communication systems, specifically improving the transmission of acknowledgment/negative acknowledgment (ACK/NACK) signals in scenarios where multiple access (MA) signatures are used. The problem addressed is the efficient and reliable transmission of ACK/NACK signals in a shared frequency band, particularly when multiple devices or users are communicating simultaneously. The solution involves transmitting the ACK/NACK signal in a specific frequency band determined by a frequency offset value, which is linked to the value of the MA signature being used. The MA signature is a unique identifier or code assigned to a communication session or device, ensuring that the ACK/NACK signal is transmitted in a frequency band that minimizes interference and maximizes reliability. The frequency offset value is preconfigured or dynamically assigned based on the MA signature, allowing the receiving device to accurately decode the ACK/NACK signal by knowing the corresponding frequency band. This method enhances spectral efficiency and reduces collisions in dense wireless networks, particularly in scenarios like machine-type communications or massive IoT deployments where multiple devices share the same resources. The invention ensures that ACK/NACK signals are transmitted in a predictable and interference-free manner, improving overall system performance.
6. The method of claim 1 , wherein the ACK/NACK signal is transmitted by applying a sequence corresponding to the sequence index value tied to the value of the indicated MA signature to the ACK/NACK signal.
This invention relates to wireless communication systems, specifically improving the efficiency and reliability of acknowledgment (ACK/NACK) signaling in scenarios where multiple access (MA) signatures are used. The problem addressed is the need for a more robust and flexible way to transmit ACK/NACK signals when multiple devices share the same communication channel, reducing collisions and improving error detection. The method involves transmitting an ACK/NACK signal by applying a sequence derived from a sequence index value. This sequence index is tied to the value of a specific multiple access (MA) signature used in the communication. By mapping the MA signature to a unique sequence, the system ensures that the ACK/NACK signal is distinguishable even when multiple devices are transmitting simultaneously. This approach enhances signal integrity and reduces the likelihood of misinterpretation due to interference or overlapping transmissions. The sequence applied to the ACK/NACK signal is selected based on the MA signature value, allowing the receiver to decode the acknowledgment correctly by referencing the same sequence index. This technique is particularly useful in dense wireless networks where multiple devices may attempt to transmit acknowledgments at the same time, ensuring reliable feedback without requiring additional bandwidth or complex coordination mechanisms. The method improves overall system efficiency by minimizing retransmissions and optimizing resource usage.
7. The method of claim 1 , wherein the MA signature field is a 2-bit field.
A method for managing message authentication in a communication system involves using a message authentication (MA) signature field to verify the integrity and authenticity of transmitted messages. The MA signature field is a 2-bit field, allowing for four possible states to represent different authentication statuses or levels. This field is integrated into the message header or metadata to enable efficient verification without significantly increasing overhead. The method ensures that messages are checked for tampering or unauthorized modifications during transmission, enhancing security in communication protocols. The 2-bit design balances simplicity and functionality, providing enough states to distinguish between valid, invalid, or partially authenticated messages while minimizing resource usage. This approach is particularly useful in systems where low-latency and minimal processing overhead are critical, such as real-time communication networks or embedded systems. The method may also include additional steps for generating, validating, or updating the MA signature based on cryptographic algorithms or predefined rules, ensuring robust security measures. The 2-bit field can be dynamically adjusted or interpreted depending on the system's requirements, allowing flexibility in different operational scenarios.
8. A user equipment (UE) for performing a hybrid automatic repeat request (HARQ) operation in a non-orthogonal multiple access (NoMA) based system, the UE comprising: a receiver; a transmitter; and a processor, wherein the processor is configured to: control the receiver to receive a downlink control information (DCI) format including a multiple access (MA) signature field for supporting NoMA transmission and receive downlink data based on a value of an MA signature indicated by the MA signature field; and perform control to transmit an acknowledgement/negative acknowledgement (ACK/NACK) signal for the downlink data based on a subframe offset value, a frequency offset value, or a sequence index value tied to the value of the indicated MA signature according to a predetermined rule, wherein the subframe offset value comprises a subframe offset value between a subframe in which the downlink data is received and a subframe in which the downlink HARQ feedback for the downlink data is transmitted, and wherein the frequency offset value indicates a frequency band for transmitting the ACK/NACK signal.
This invention relates to a user equipment (UE) for performing hybrid automatic repeat request (HARQ) operations in a non-orthogonal multiple access (NoMA) based wireless communication system. NoMA systems allow multiple users to share the same time-frequency resources by using different multiple access (MA) signatures, which can improve spectral efficiency but introduce challenges in HARQ feedback transmission. The UE includes a receiver, a transmitter, and a processor. The processor controls the receiver to receive downlink control information (DCI) containing an MA signature field, which indicates the specific MA signature used for downlink data transmission. The UE then receives the downlink data based on the indicated MA signature. To provide HARQ feedback, the UE transmits an acknowledgement/negative acknowledgement (ACK/NACK) signal for the downlink data using a subframe offset value, a frequency offset value, or a sequence index value derived from the MA signature value according to a predetermined rule. The subframe offset value determines the timing difference between the subframe carrying the downlink data and the subframe carrying the HARQ feedback. The frequency offset value specifies the frequency band used for transmitting the ACK/NACK signal. This approach ensures efficient and collision-free HARQ feedback in NoMA systems by mapping feedback resources to the MA signature used for data transmission.
9. The UE of claim 8 , wherein the MA signature comprises a codeword index, a codebook index, an interleaver index, a demodulation reference signal index, a spatial dimension, or a power dimension.
This invention relates to wireless communication systems, specifically to user equipment (UE) configured for multi-antenna (MA) communication. The problem addressed is the efficient signaling and identification of MA configurations in wireless networks, particularly in scenarios where multiple antennas are used to enhance communication performance. The invention describes a UE that generates and transmits a multi-antenna (MA) signature to a network node, such as a base station, to facilitate beamforming, spatial multiplexing, or other MA techniques. The MA signature includes parameters that define the UE's antenna configuration, allowing the network to optimize communication based on the UE's capabilities. The signature may include a codeword index, codebook index, interleaver index, demodulation reference signal index, spatial dimension, or power dimension. These parameters enable the network to select appropriate precoding matrices, beamforming weights, or other transmission strategies tailored to the UE's MA setup. The invention improves communication efficiency by ensuring the network has accurate information about the UE's antenna configuration, reducing signaling overhead and enhancing data throughput. The UE may dynamically update the MA signature based on channel conditions or network requirements, ensuring optimal performance in varying environments. This approach is particularly useful in advanced wireless systems like 5G and beyond, where MA techniques are critical for achieving high data rates and reliable connectivity.
10. The UE of claim 8 , wherein the processor is configured to control the transmitter to transmit the ACK/NACK signal further based on a number of a control channel element (CCE) on which the MA signature field is transmitted according to the predetermined rule.
This invention relates to wireless communication systems, specifically to user equipment (UE) in a cellular network that transmits acknowledgment/negative acknowledgment (ACK/NACK) signals in response to received downlink data. The problem addressed is efficiently managing ACK/NACK transmissions in scenarios where multiple UEs share the same resources, such as in multi-user scenarios or carrier aggregation, to avoid collisions and ensure reliable feedback. The UE includes a processor and a transmitter. The processor determines a modulation and coding scheme (MCS) for the ACK/NACK signal based on a multi-access (MA) signature field received in a downlink control channel. The MA signature field is transmitted according to a predetermined rule, which may involve selecting a specific control channel element (CCE) or a subset of CCEs to encode the MA signature. The processor then controls the transmitter to send the ACK/NACK signal using the determined MCS, where the transmission is further influenced by the number of CCEs carrying the MA signature. This ensures that the ACK/NACK signal is correctly interpreted by the network, even in high-load conditions. The invention improves spectral efficiency and reduces feedback overhead by dynamically adjusting the ACK/NACK transmission parameters based on the MA signature and CCE allocation.
11. The UE of claim 8 , wherein the processor is configured to control the transmitter to transmit the ACK/NACK signal in the subframe indicated by the subframe offset value tied to the value of the indicated MA signature.
This invention relates to wireless communication systems, specifically to user equipment (UE) handling acknowledgment/negative acknowledgment (ACK/NACK) signaling in multi-carrier or multi-antenna configurations. The problem addressed is efficient ACK/NACK transmission in scenarios where multiple antennas or carriers are used, requiring precise timing and resource allocation to avoid collisions and ensure reliable feedback. The UE includes a processor and a transmitter. The processor is configured to determine a subframe offset value based on a multi-antenna (MA) signature value received from a network node. This MA signature value indicates a specific antenna or carrier configuration. The subframe offset value dictates the timing of ACK/NACK transmission, ensuring proper synchronization with the network. The transmitter is then controlled to send the ACK/NACK signal in the subframe specified by this offset value. This mechanism prevents conflicts with other UEs and optimizes resource usage. The invention also involves receiving downlink control information (DCI) that includes the MA signature value, which the UE decodes to extract the subframe offset. The processor may further adjust the offset based on additional parameters, such as timing advance or carrier-specific delays, to maintain synchronization. The solution ensures reliable ACK/NACK feedback in advanced wireless systems with multiple antennas or carriers.
12. The UE of claim 8 , wherein the processor is configured to control the transmitter to transmit the ACK/NACK signal in the frequency band indicated by the frequency offset value tied to the value of the indicated MA signature.
This invention relates to wireless communication systems, specifically to user equipment (UE) configured to transmit acknowledgment/negative acknowledgment (ACK/NACK) signals in a frequency band determined by a frequency offset value. The problem addressed is efficient and reliable transmission of ACK/NACK signals in scenarios where multiple UEs may need to share the same uplink resources, such as in multi-user multiple-input multiple-output (MU-MIMO) or carrier aggregation environments. The UE includes a processor and a transmitter. The processor is configured to determine a frequency offset value based on a multi-antenna (MA) signature value received from a base station. The MA signature value is used to identify the UE or its transmission configuration. The frequency offset value specifies a particular frequency band within an allocated uplink resource where the UE should transmit its ACK/NACK signal. By tying the frequency offset to the MA signature, the system ensures that different UEs can transmit their ACK/NACK signals in distinct frequency bands, reducing collisions and improving reliability. The transmitter is controlled by the processor to send the ACK/NACK signal in the frequency band indicated by the frequency offset value. This approach allows the base station to distinguish between ACK/NACK signals from different UEs based on their frequency positions, even when multiple UEs transmit simultaneously. The invention enhances spectral efficiency and reduces interference in wireless communication systems.
13. The UE of claim 8 , wherein the processor is configured to: apply a sequence corresponding to the sequence index value tied to the value of the indicated MA signature to the ACK/NACK signal; and control the transmitter to transmit the ACK/NACK signal to which the sequence is applied.
This invention relates to wireless communication systems, specifically improving the transmission of acknowledgment/negative acknowledgment (ACK/NACK) signals in user equipment (UE). The problem addressed is the need for efficient and reliable signaling of ACK/NACK responses in scenarios where multiple antennas or spatial multiplexing is used, ensuring proper detection at the receiver. The UE includes a processor and a transmitter. The processor is configured to apply a specific sequence to the ACK/NACK signal based on a sequence index value. This sequence index is tied to a value derived from a multi-antenna (MA) signature, which may represent a precoding matrix or spatial layer configuration used in the transmission. The sequence is applied to the ACK/NACK signal to enhance distinguishability and reduce interference, particularly in multi-user or multi-antenna environments. The transmitter then sends the modified ACK/NACK signal to the receiver, ensuring accurate decoding despite potential channel impairments. The invention ensures that the ACK/NACK signal is uniquely identifiable by the receiver, leveraging the MA signature to improve reliability in complex transmission schemes. This approach is particularly useful in advanced wireless systems where multiple antennas and spatial multiplexing are employed to increase data rates and spectral efficiency. The sequence application process helps mitigate errors and interference, ensuring robust feedback transmission.
14. The UE of claim 8 , wherein the MA signature field is a 2-bit field.
A system and method for wireless communication involves a user equipment (UE) device configured to generate and transmit a multi-access (MA) signature field in a physical layer protocol data unit (PPDU). The MA signature field is a 2-bit field used to identify different types of multi-access transmissions, such as orthogonal frequency-division multiple access (OFDMA) or non-orthogonal multiple access (NOMA). The UE determines the appropriate MA signature value based on the transmission type and includes it in the PPDU header. This allows receiving devices to quickly identify the access scheme used, improving efficiency in wireless networks. The 2-bit field provides sufficient granularity to distinguish between multiple access methods while minimizing overhead. The UE may also adjust the MA signature based on network conditions or configuration parameters received from a base station. This approach enhances compatibility and interoperability in heterogeneous wireless environments.
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January 12, 2021
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